4.4 Article

Quantifying spatio-temporal consistency in the trophic ecology of two sympatric flatfishes

期刊

JOURNAL OF FISH BIOLOGY
卷 103, 期 2, 页码 378-392

出版社

WILEY
DOI: 10.1111/jfb.15458

关键词

coastal; flatfishes; stable isotopes; stomach contents; sympatric; trophic ecology

向作者/读者索取更多资源

Sympatric flatfish predators in coastal environments may partition their resources to reduce competition and increase foraging efficiency. However, the consistency in their feeding habits over time and space is not well understood. This study uses stomach content and stable isotope analysis to investigate the feeding habits of two flatfish predators across different temporal scales, revealing changes in resource partitioning and diet switching in response to prey availability.
Sympatric flatfish predators may partition their resources in coastal environments to reduce competition and maximise foraging efficiency. However, the degree of spatial and temporal consistency in their trophic ecology is not well understood because dietary studies tend to overlook the heterogeneity of consumed prey. Increasing the spatial and temporal scale of dietary analyses can thus help to resolve predator resource use. We applied a stomach content and multi-tissue (liver and muscle) stable isotope (d(13)C, d(15)N and d(34)S) approach to investigate the feeding habits of two co-occurring flatfish predators, common dab (Limanda limanda) and European plaice (Pleuronectes platessa), across four bays on the Northumberland coast (UK) over short (hours), medium (days) and long (months) temporal scales. Stomach content analyses showed spatial consistencies in predator resource use, whereas stable isotope mixing models revealed considerable inter-bay diet variability. Stomach contents also indicated high dietary overlap between L. limanda and P. platessa, while the stable isotope data yielded low to moderate levels of overlap, with cases of complete niche separation. Furthermore, individual specialisation metrics indicated consistently low levels of specialisation among conspecifics over time. We document changes in resource partitioning in space and time, reflecting diet switching in response to local and temporal fluctuations of patchily distributed prey. This study highlights how trophic tracers integrated at multiple temporal and spatial scales (within tens of kilometres) provide a more integrative approach for assessing the trophic ecology of sympatric predators in dynamic environments.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据